DongshanPI-AICT全志V853开发板MIPI显示屏适配指南

将驱动程序添加到

内核的lcd驱动目录下：

tina-v853-open/kernel/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/lcd

uboot的lcd驱动目录下：

tina-v853-open/brandy/brandy-2.0/u-boot-2018/drivers/video/sunxi/disp2/disp/lcd/

由于uboot和内核中的屏驱动会存在一些差别，下面分别展示出uboot和内核中不同的屏驱动。具体源文件可以在4寸屏适配资源包中查看。

驱动程序头文件tft08006.h

• #ifndef _TFT08006_H
• #define _TFT08006_H
• #include "panels.h"
• extern __lcd_panel_t tft08006_panel;
• extern s32 bsp_disp_get_panel_info(u32 screen_id, disp_panel_para *info);
• #endif /*End of file*/
  

驱动程序的C文件tft08006.c

这里只展示与内核不同的部分

• __lcd_panel_t tft08006_panel = {
• /* panel driver name, must mach the name of
• * lcd_drv_name in sys_config.fex
• */
• .name = "tft08006",
• .func = {
• .cfg_panel_info = lcd_cfg_panel_info,
• .cfg_open_flow = lcd_open_flow,
• .cfg_close_flow = lcd_close_flow,
• .lcd_user_defined_func = lcd_user_defined_func,
• },
• };
  

驱动程序头文件tft08006.h

• #ifndef _TFT08006_H
• #define _TFT08006_H
• #include "panels.h"
• extern struct __lcd_panel tft08006_panel;
• extern s32 bsp_disp_get_panel_info(u32 screen_id, struct disp_panel_para *info);
• #endif /*End of file*/
  

驱动程序的C文件"tft08006.c，这里只展示与uboot不同的部分。

• struct __lcd_panel tft08006_panel = {
• /* panel driver name, must mach the name of
• * lcd_drv_name in sys_config.fex
• */
• .name = "tft08006",
• .func = {
• .cfg_panel_info = lcd_cfg_panel_info,
• .cfg_open_flow = lcd_open_flow,
• .cfg_close_flow = lcd_close_flow,
• .lcd_user_defined_func = lcd_user_defined_func,
• },
• };
  

由于内核中没有对tft08006屏驱动有相关的配置，所以我们还需要在panels全志显示驱动中增加定义。

在屏驱动目录下修改panels.h

• book<a href="https://bbs.**/home.php?mod=space&uid=490" target="_blank">@1</a> 00ask:~/workspaces/tina-v853-open/kernel/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/lcd$ vi panels.h
  

在icn6202屏驱动定义的后面增加tft08006屏驱动定义

• #ifdef CONFIG_LCD_SUPPORT_ICN6202
• extern struct __lcd_panel icn6202_panel;
• #endif
• #ifdef CONFIG_LCD_SUPPORT_ICN6202
• extern struct __lcd_panel icn6202_panel;
• #endif
• #ifdef CONFIG_LCD_SUPPORT_NT35510_MIPI
• extern struct __lcd_panel nt35510_panel;
• #endif
  

按下ESC，输入:wq，保存刚才的修改并退出

在屏驱动目录下修改panels.c

• book@100ask:~/workspaces/tina-v853-open/kernel/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/lcd$ vi panels.c
  

在icn6202屏驱动定义的后面增加tft08006屏驱动定义

• #ifdef CONFIG_LCD_SUPPORT_ICN6202
• &icn6202_panel,
• #endif
• #ifdef CONFIG_LCD_SUPPORT_TFT08006
• &tft08006_panel,
• #endif
• #ifdef CONFIG_LCD_SUPPORT_NT35510_MIPI
• &nt35510_panel,
• #endif
  

按下ESC，输入:wq，保存刚才的修改并退出

修改屏驱动目录下的Kconfig，使内核配置中增加tft08006屏驱动的，以便后续选择编译该屏驱动

在屏驱动目录下输入vi Kconfig

• tina-v853-open/kernel/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/lcd$ vi Kconfig
  

在icn6202屏驱动配置的后面增加tft08006屏驱动配置

• config LCD_SUPPORT_ICN6202
• bool "LCD support icn6202 panel"
• default n
• ---help---
• If you want to support icn6202 panel for display driver, select it.
• config LCD_SUPPORT_TFT08006
• bool "LCD support tft08006 panel"
• default n
• ---help---
• If you want to support tft08006 panel for display driver, select it.
• config LCD_SUPPORT_NT35510_MIPI
• bool "LCD support nt35510_mipi panel"
• default n
• help
• If you want to support nt35510_mipi panel for display driver, select it.
  

按下ESC，输入:wq，保存刚才的修改并退出

返回屏驱动的上一级目录，修改Makefile文件

• book@100ask:~/workspaces/tina-v853-open/kernel/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp$ vi Makefile
  

在icn6202屏驱动编译规则的后面增加tft08006屏驱动编译规则

• disp-$(CONFIG_LCD_SUPPORT_ICN6202) += lcd/icn6202.o
• disp-$(CONFIG_LCD_SUPPORT_TFT08006) += lcd/tft08006.o
• disp-$(CONFIG_LCD_SUPPORT_NT35510_MIPI) += lcd/nt35510.o
  

按下ESC，输入:wq，保存刚才的修改并退出

在Tina的根目录下输入make kernel_menuconfig,进入内核配置界面。

• book@100ask:~/workspaces/tina-v853-open$ make kernel_menuconfig
  

在选中屏驱动前，要确保DISP Driver Support(sunxi-disp2)<span> </span>，我们的提供的SDK默认已经打开了，如果您之前关闭了，需要在内核配置界面中，进入Video support for sunxi目录下输入Y选中sunxi-disp2打开lcd节点配置。

• → Device Drivers
• → Graphics support
• → Frame buffer Devices
• → Video support for sunxi
• <*> DISP Driver Support(sunxi-disp2)
  

进入屏驱动目录，输入Y选中tft08006

• → Device Drivers
• → Graphics support
• → Frame buffer Devices
• → Video support for sunxi
• → LCD panels select
• <li> LCD support tft08006 panel
  

如下图所示，选中tft08006屏驱动，编译到内核中。

[

保存并退出内核配置界面。

进入uboot的根目录下，执行make menuconfig，打开uboot配置界面。

• book@100ask:~/workspaces/tina-v853-open/brandy/brandy-2.0/u-boot-2018$ make menuconfig
  

在选中屏驱动前，要确保DISP Driver Support(sunxi-disp2)<span> </span>，我们的提供的SDK默认已经打开了，如果您之前关闭了，需要在内核配置界面中，进入Graphics support目录下输入Y选中sunxi-disp2打开lcd节点配置。

• → Device Drivers
• → Graphics support
• <li> DISP Driver Support(sunxi-disp2) --->
  

进入屏驱动目录下，输入Y选中TFT08006屏驱动。

• → Device Drivers
• → Graphics support
• → LCD panels select
• <li> LCD support TFT08006 panel
  

如下图所示，选中tft08006屏驱动。

[

保存并退出uboot配置界面

设备树位置：tina-v853-open/device/config/chips/v853/configs/100ask/

• book@100ask:~/workspaces/tina-v853-open/device/config/chips/v853/configs/100ask$ ls
• BoardConfig.mk board.dts buildroot env.cfg linux-4.9 sys_config.fex uboot-board.dts
  

其中board.dts为内核设备树，uboot-board.dts为uboot设备树。

在设备树的目录下输入vi uboot-board.dts，编译uboot设备树。

• book@100ask:~/workspaces/tina-v853-open/device/config/chips/v853/configs/100ask$ vi uboot-board.dts
  

注释掉原来的lcd0节点，修改tft08006屏lcd0节点

• &lcd0 {
• base_config_start = <1>;
• lcd_used = <1>;
• lcd_driver_name = "tft08006";
• lcd_backlight = <500>;
• lcd_if = <4>;
• lcd_x = <480>;
• lcd_y = <800>;
• lcd_width = <52>;
• lcd_height = <52>;
• lcd_dclk_freq = <25>;
• lcd_pwm_used = <1>;
• lcd_pwm_ch = <9>;
• lcd_pwm_freq = <50000>;
• lcd_pwm_pol = <1>;
• lcd_pwm_max_limit = <255>;
• lcd_hbp = <10>;
• lcd_ht = <515>;
• lcd_hspw = <5>;
• lcd_vbp = <20>;
• lcd_vt = <830>;
• lcd_vspw = <5>;
• lcd_dsi_if = <0>;
• lcd_dsi_lane = <2>;
• lcd_dsi_format = <0>;
• lcd_dsi_te = <0>;
• lcd_dsi_eotp = <0>;
• lcd_frm = <0>;
• lcd_io_phase = <0x0000>;
• lcd_hv_clk_phase = <0>;
• lcd_hv_sync_polarity= <0>;
• lcd_gamma_en = <0>;
• lcd_bright_curve_en = <0>;
• lcd_cmap_en = <0>;
• lcdgamma4iep = <22>;
• lcd_gpio_0 = <&pio PH 0 1 0 3 1>;
• pinctrl-0 = <&dsi4lane_pins_a>;
• pinctrl-1 = <&dsi4lane_pins_b>;
• base_config_end = <1>;
• };
  

在&pio节点后增加复用引脚

• dsi4lane_pins_a: dsi4lane@0 {
• allwinner,pins = "PD1", "PD2", "PD3", "PD4", "PD5", "PD6", "PD7", "PD9", "PD10", "PD11";
• allwinner,pname = "PD1", "PD2", "PD3", "PD4", "PD5", "PD6", "PD7", "PD9", "PD10", "PD11";
• allwinner,function = "dsi";
• allwinner,muxsel = <5>;
• allwinner,drive = <3>;
• allwinner,pull = <0>;
• };
• dsi4lane_pins_b: dsi4lane@1 {
• allwinner,pins = "PD1", "PD2", "PD3", "PD4", "PD5", "PD6", "PD7", "PD9", "PD10", "PD11";
• allwinner,pname = "PD1", "PD2", "PD3", "PD4", "PD5", "PD6", "PD7", "PD9", "PD10", "DP11";
• allwinner,function = "io_disabled";
• allwinner,muxsel = <0xf>;
• allwinner,drive = <1>;
• allwinner,pull = <0>;
• };
  

在设备树的目录下输入vi board.dts，编译内核设备树。

• book@100ask:~/workspaces/tina-v853-open/device/config/chips/v853/configs/100ask$ vi board.dts
  

注释掉原来的lcd0节点，修改tft08006屏lcd0节点

• &lcd0 {
• base_config_start = <1>;
• lcd_used = <1>;
• lcd_driver_name = "tft08006";
• lcd_backlight = <500>;
• lcd_if = <4>;
• lcd_x = <480>;
• lcd_y = <800>;
• lcd_width = <52>;
• lcd_height = <52>;
• lcd_dclk_freq = <25>;
• lcd_pwm_used = <1>;
• lcd_pwm_ch = <9>;
• lcd_pwm_freq = <50000>;
• lcd_pwm_pol = <1>;
• lcd_pwm_max_limit = <255>;
• lcd_hbp = <10>;
• lcd_ht = <515>;
• lcd_hspw = <5>;
• lcd_vbp = <20>;
• lcd_vt = <830>;
• lcd_vspw = <5>;
• lcd_dsi_if = <0>;
• lcd_dsi_lane = <2>;
• lcd_dsi_format = <0>;
• lcd_dsi_te = <0>;
• lcd_dsi_eotp = <0>;
• lcd_frm = <0>;
• lcd_io_phase = <0x0000>;
• lcd_hv_clk_phase = <0>;
• lcd_hv_sync_polarity= <0>;
• lcd_gamma_en = <0>;
• lcd_bright_curve_en = <0>;
• lcd_cmap_en = <0>;
• lcdgamma4iep = <22>;
• lcd_gpio_0 = <&pio PH 0 1 0 3 1>;
• pinctrl-0 = <&dsi4lane_pins_a>;
• pinctrl-1 = <&dsi4lane_pins_b>;
• base_config_end = <1>;
• };
  

在&pio节点后增加复用引脚

• dsi4lane_pins_a: dsi4lane@0 {
• allwinner,pins = "PD1", "PD2", "PD3", "PD4", "PD5", "PD6", "PD7", "PD9", "PD10", "PD11";
• allwinner,pname = "PD1", "PD2", "PD3", "PD4", "PD5", "PD6", "PD7", "PD9", "PD10", "PD11";
• allwinner,function = "dsi";
• allwinner,muxsel = <5>;
• allwinner,drive = <3>;
• allwinner,pull = <0>;
• };
• dsi4lane_pins_b: dsi4lane@1 {
• allwinner,pins = "PD1", "PD2", "PD3", "PD4", "PD5", "PD6", "PD7", "PD9", "PD10", "PD11";
• allwinner,pname = "PD1", "PD2", "PD3", "PD4", "PD5", "PD6", "PD7", "PD9", "PD10", "DP11";
• allwinner,function = "io_disabled";
• allwinner,muxsel = <0xf>;
• allwinner,drive = <1>;
• allwinner,pull = <0>;
• };
  

通过拿到的屏幕资料包，我们可以知道该MIPI屏的触摸芯片为FT5336，下面我们使用全志已经内置好的FT6336触摸驱动。

修改twi2节点，使用ft6336驱动，修改触摸的范围。宽X为480，高y为800。其中初始化引脚需要查看V853底板原理图，其中初始化引脚为PH7，唤醒引脚为PH8。

[

• &twi2 {
• ctp@38 {
• status = "okay";
• ctp_used = <1>;
• ctp_name = "ft6336";
• ctp_twi_id = <0x2>;
• ctp_twi_addr = <0x38>;
• ctp_screen_max_x = <0x480>;
• ctp_screen_max_y = <0x800>;
• ctp_revert_x_flag = <0x0>;
• ctp_revert_y_flag = <0x1>;
• ctp_exchange_x_y_flag = <0x0>;
• ctp_int_port = <&pio PH 7 6 1 3 0xffffffff>;
• ctp_wakeup = <&pio PH 8 1 1 3 0xffffffff>;
• };
• };
  

​ 由于我们之前适配过了RGB屏触摸驱动，所以需要进入内核中修改为我们使用的新驱动，进入如下目录中，按下空格键取消勾选之前的触摸驱动gt9xxnew touchscreen driver，输入Y选中我们使用的ft6336 touchscreen driver新驱动，并保存退出。

• → Device Drivers
• → Input device support
• → Touchscreens
• <*> ft6336 touchscreen driver
  

[

修改ft6336.c触摸驱动程序，这里只展示修改的部分，源文件可见4寸屏适配资源包中查看。

• input_report_abs(ts->input_dev,
• ABS_MT_POSITION_X, -(event->au16_x<i>-480));
• input_report_abs(ts->input_dev,
• ABS_MT_POSITION_Y, -(event->au16_y<i>-800));
  

由于Tina使用的默认绑定的触摸节点为/dev/input/event0，我们需要修改lvgl驱动头文件中绑定的节点为我们触摸驱动上报数据的节点，我们触摸驱动上报的节点为event2，所以需要进入

tina-v853-open/platform/thirdparty/gui/lvgl-8/lv_examples/src目录下修改lv_drv_conf.h头文件，如下所示

• book@100ask:~/workspaces/tina-v853-open$ cd platform/thirdparty/gui/lvgl-8/lv_examples/src/
• book@100ask:~/workspaces/tina-v853-open/platform/thirdparty/gui/lvgl-8/lv_examples/src$ vi lv_drv_conf.h
  

找到触摸节点中的LIBINPUT_NAME，将原来的/dev/input/event0修改/dev/input/event2,如下图红框内所示。

[

注意：我们这里修改的是头文件，可能之前编译生成过了之后再重新编译时可能不会再编译头文件，导致修改的节点不会生效，可以手动删除out目录中的lv_examples示例程序或者直接删除out目录重新编译即可。具体原因可以观看韦东山老师的《ARM架构与编程》课程中的gcc编译过程详解。访问链接为

返回Tina根目录下，输入make,编译系统

• book@100ask:~/workspaces/tina-v853-open$ make -j4
• ...
• sun8iw21p1 compile Kernel successful
• INFO: ----------------------------------------
• INFO: build Tina OK.
• INFO: ----------------------------------------
  

打包生成镜像，输入pack

• book@100ask:~/workspaces/tina-v853-open$ pack
• ...
• Dragon execute image.cfg SUCCESS !
• ----------image is at----------
• 33M /home/book/workspaces/tina-v853-open/out/v853/100ask/openwrt/v853_linux_100ask_uart0.img
• pack finish
  

​ 打包完成后，将新生成的镜像拷贝到Windows主机电脑上，使用全志PhoenixSuit烧写工具，烧写到开发板上。具体可以参考：

​ 接完排线后，重新接入电源，和2条Type-C数据线，再将开关拨向电源接口处上电启动，启动时会出现Tina Linux小企鹅**，进入系统后，可以查看触摸节点

• root@TinaLinux:/# ls /dev/input/
• event0 event1 event2
  

​ 我们使用的event2，如果你不确定您的触摸驱动程序使用的是哪个，可以通过cat /dev/input/event*，其中*表示要查看的是哪一个触摸节点，例如我使用的是event2，则需要输入cat /dev/input/event2，此时触摸屏幕会有上报信息。

​ 使用LVGL DEMO示例，输入lv_examples 0启动lvgl示例，可以通过点击屏幕上的UI交互按钮测试触摸是否生效。

• root@TinaLinux:/# lv_examples 0
• wh=480x800, vwh=480x1600, bpp=32, rotated=0
• Turn on double buffering.
• Turn on 2d hardware acceleration.
• Turn on 2d hardware acceleration rotate.